Moscow July 11 (RFE/RL) -- Russia's top security officials says the bomb blast that occurred on a trolley-bus in central Moscow today was a "terrorist act." Security Council Secretary Aleksandr Lebed said the bomb was a "mad, ill-considered terrorist act aimed at raising tension in Moscow." Five people were wounded in the explosion, which took place when a
bomb left in a bag exploded in a trolley-bus. The driver's cabin was
wrecked in the blast. The driver was seriously injured, with burns
and a broken leg. Moscow health authorities say the other three
people had already been released from hospital with minor injuries.

Interfax news agency quoted Federal Security Service officials as saying nobody, so far, had claimed responsibility for the explosion.

Moscow Mayor Yury Luzhkov said on Russian TV that all the necessary measures would be taken to "ensure that this does not go
unpunished."

The blast is the second explosion on the Moscow public
transportation system in a month. It comes as Lebed and Luzhkov
launched an anti-crime drive in the Russian capital.